Xu Zhenzhu, Jiang Yanling, Zhou Guangsheng
State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences Beijing, China.
State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences Beijing, China ; Chinese Academy of Meteorological Sciences Beijing, China.
Front Plant Sci. 2015 Sep 10;6:701. doi: 10.3389/fpls.2015.00701. eCollection 2015.
It is well known that plant photosynthesis and respiration are two fundamental and crucial physiological processes, while the critical role of the antioxidant system in response to abiotic factors is still a focus point for investigating physiological stress. Although one key metabolic process and its response to climatic change have already been reported and reviewed, an integrative review, including several biological processes at multiple scales, has not been well reported. The current review will present a synthesis focusing on the underlying mechanisms in the responses to elevated CO2 at multiple scales, including molecular, cellular, biochemical, physiological, and individual aspects, particularly, for these biological processes under elevated CO2 with other key abiotic stresses, such as heat, drought, and ozone pollution, as well as nitrogen limitation. The present comprehensive review may add timely and substantial information about the topic in recent studies, while it presents what has been well established in previous reviews. First, an outline of the critical biological processes, and an overview of their roles in environmental regulation, is presented. Second, the research advances with regard to the individual subtopics are reviewed, including the response and adaptation of the photosynthetic capacity, respiration, and antioxidant system to CO2 enrichment alone, and its combination with other climatic change factors. Finally, the potential applications for plant responses at various levels to climate change are discussed. The above issue is currently of crucial concern worldwide, and this review may help in a better understanding of how plants deal with elevated CO2 using other mainstream abiotic factors, including molecular, cellular, biochemical, physiological, and whole individual processes, and the better management of the ecological environment, climate change, and sustainable development.
众所周知，植物光合作用和呼吸作用是两个基本且关键的生理过程，而抗氧化系统在应对非生物因素时的关键作用仍是生理胁迫研究的一个焦点。尽管一个关键的代谢过程及其对气候变化的响应已有报道和综述，但包括多个尺度上的几个生物学过程的综合综述尚未得到充分报道。本综述将进行综合阐述，重点关注多尺度下对二氧化碳浓度升高的响应的潜在机制，包括分子、细胞、生化、生理和个体层面，特别是在二氧化碳浓度升高与其他关键非生物胁迫（如高温、干旱、臭氧污染以及氮限制）共同作用下的这些生物学过程。本全面综述可能会在近期研究中及时补充有关该主题的大量信息，同时呈现先前综述中已确立的内容。首先，介绍关键生物学过程的概述及其在环境调节中的作用。其次，回顾各个子主题的研究进展，包括光合能力、呼吸作用和抗氧化系统对单独二氧化碳富集以及与其他气候变化因素组合的响应和适应。最后，讨论植物在各个层面上对气候变化的响应的潜在应用。上述问题目前在全球范围内备受关注，本综述可能有助于更好地理解植物如何利用包括分子、细胞、生化、生理和整个个体过程在内的其他主流非生物因素来应对二氧化碳浓度升高，以及更好地管理生态环境、气候变化和可持续发展。
